1 files changed, 282 insertions, 0 deletions
diff --git a/arch/h8300/kernel/sys_h8300.c b/arch/h8300/kernel/sys_h8300.c
new file mode 100644
index 00000000000..0f61b7ad69a
--- /dev/null
+++ b/arch/h8300/kernel/sys_h8300.c
@@ -0,0 +1,282 @@
+/*
+ * linux/arch/h8300/kernel/sys_h8300.c
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the H8/300
+ * platform.
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/syscalls.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+
+#include <asm/setup.h>
+#include <asm/uaccess.h>
+#include <asm/cachectl.h>
+#include <asm/traps.h>
+#include <asm/ipc.h>
+
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way unix traditionally does this, though.
+ */
+asmlinkage int sys_pipe(unsigned long * fildes)
+{
+	int fd[2];
+	int error;
+
+	error = do_pipe(fd);
+	if (!error) {
+		if (copy_to_user(fildes, fd, 2*sizeof(int)))
+			error = -EFAULT;
+	}
+	return error;
+}
+
+/* common code for old and new mmaps */
+static inline long do_mmap2(
+	unsigned long addr, unsigned long len,
+	unsigned long prot, unsigned long flags,
+	unsigned long fd, unsigned long pgoff)
+{
+	int error = -EBADF;
+	struct file * file = NULL;
+
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	if (!(flags & MAP_ANONYMOUS)) {
+		file = fget(fd);
+		if (!file)
+			goto out;
+	}
+
+	down_write(&current->mm->mmap_sem);
+	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+	up_write(&current->mm->mmap_sem);
+
+	if (file)
+		fput(file);
+out:
+	return error;
+}
+
+asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
+	unsigned long prot, unsigned long flags,
+	unsigned long fd, unsigned long pgoff)
+{
+	return do_mmap2(addr, len, prot, flags, fd, pgoff);
+}
+
+/*
+ * Perform the select(nd, in, out, ex, tv) and mmap() system
+ * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
+ * handle more than 4 system call parameters, so these system calls
+ * used a memory block for parameter passing..
+ */
+
+struct mmap_arg_struct {
+	unsigned long addr;
+	unsigned long len;
+	unsigned long prot;
+	unsigned long flags;
+	unsigned long fd;
+	unsigned long offset;
+};
+
+asmlinkage int old_mmap(struct mmap_arg_struct *arg)
+{
+	struct mmap_arg_struct a;
+	int error = -EFAULT;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		goto out;
+
+	error = -EINVAL;
+	if (a.offset & ~PAGE_MASK)
+		goto out;
+
+	a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+
+	error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
+out:
+	return error;
+}
+
+#if 0 /* DAVIDM - do we want this */
+struct mmap_arg_struct64 {
+	__u32 addr;
+	__u32 len;
+	__u32 prot;
+	__u32 flags;
+	__u64 offset; /* 64 bits */
+	__u32 fd;
+};
+
+asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg)
+{
+	int error = -EFAULT;
+	struct file * file = NULL;
+	struct mmap_arg_struct64 a;
+	unsigned long pgoff;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+
+	if ((long)a.offset & ~PAGE_MASK)
+		return -EINVAL;
+
+	pgoff = a.offset >> PAGE_SHIFT;
+	if ((a.offset >> PAGE_SHIFT) != pgoff)
+		return -EINVAL;
+
+	if (!(a.flags & MAP_ANONYMOUS)) {
+		error = -EBADF;
+		file = fget(a.fd);
+		if (!file)
+			goto out;
+	}
+	a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+
+	down_write(&current->mm->mmap_sem);
+	error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff);
+	up_write(&current->mm->mmap_sem);
+	if (file)
+		fput(file);
+out:
+	return error;
+}
+#endif
+
+struct sel_arg_struct {
+	unsigned long n;
+	fd_set *inp, *outp, *exp;
+	struct timeval *tvp;
+};
+
+asmlinkage int old_select(struct sel_arg_struct *arg)
+{
+	struct sel_arg_struct a;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+	/* sys_select() does the appropriate kernel locking */
+	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
+}
+
+/*
+ * sys_ipc() is the de-multiplexer for the SysV IPC calls..
+ *
+ * This is really horribly ugly.
+ */
+asmlinkage int sys_ipc (uint call, int first, int second,
+			int third, void *ptr, long fifth)
+{
+	int version, ret;
+
+	version = call >> 16; /* hack for backward compatibility */
+	call &= 0xffff;
+
+	if (call <= SEMCTL)
+		switch (call) {
+		case SEMOP:
+			return sys_semop (first, (struct sembuf *)ptr, second);
+		case SEMGET:
+			return sys_semget (first, second, third);
+		case SEMCTL: {
+			union semun fourth;
+			if (!ptr)
+				return -EINVAL;
+			if (get_user(fourth.__pad, (void **) ptr))
+				return -EFAULT;
+			return sys_semctl (first, second, third, fourth);
+			}
+		default:
+			return -EINVAL;
+		}
+	if (call <= MSGCTL) 
+		switch (call) {
+		case MSGSND:
+			return sys_msgsnd (first, (struct msgbuf *) ptr, 
+					  second, third);
+		case MSGRCV:
+			switch (version) {
+			case 0: {
+				struct ipc_kludge tmp;
+				if (!ptr)
+					return -EINVAL;
+				if (copy_from_user (&tmp,
+						    (struct ipc_kludge *)ptr,
+						    sizeof (tmp)))
+					return -EFAULT;
+				return sys_msgrcv (first, tmp.msgp, second,
+						   tmp.msgtyp, third);
+				}
+			default:
+				return sys_msgrcv (first,
+						   (struct msgbuf *) ptr,
+						   second, fifth, third);
+			}
+		case MSGGET:
+			return sys_msgget ((key_t) first, second);
+		case MSGCTL:
+			return sys_msgctl (first, second,
+					   (struct msqid_ds *) ptr);
+		default:
+			return -EINVAL;
+		}
+	if (call <= SHMCTL) 
+		switch (call) {
+		case SHMAT:
+			switch (version) {
+			default: {
+				ulong raddr;
+				ret = do_shmat (first, (char *) ptr,
+						 second, &raddr);
+				if (ret)
+					return ret;
+				return put_user (raddr, (ulong *) third);
+			}
+			}
+		case SHMDT: 
+			return sys_shmdt ((char *)ptr);
+		case SHMGET:
+			return sys_shmget (first, second, third);
+		case SHMCTL:
+			return sys_shmctl (first, second,
+					   (struct shmid_ds *) ptr);
+		default:
+			return -EINVAL;
+		}
+
+	return -EINVAL;
+}
+
+/* sys_cacheflush -- no support.  */
+asmlinkage int
+sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
+{
+	return -EINVAL;
+}
+
+asmlinkage int sys_getpagesize(void)
+{
+	return PAGE_SIZE;
+}
+
+#if defined(CONFIG_SYSCALL_PRINT)
+asmlinkage void syscall_print(void *dummy,...)
+{
+	struct pt_regs *regs = (struct pt_regs *) ((unsigned char *)&dummy-4);
+	printk("call %06lx:%ld 1:%08lx,2:%08lx,3:%08lx,ret:%08lx\n",
+               ((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
+}
+#endif